Added extra information in LLT to support ambiguous fp types during
GlobalISel. Original idea by @tgymnich
Main differences from https://github.com/llvm/llvm-project/pull/122503
are:
* Do not deprecate LLT::scalar
* Allow targets to enable/disable IR translation with extenden LLT via
`TargetOption::EnableGlobalISelExtendedLLT` (disabled by default)
* `IRTranslator` use `TargetLoweringInfo` for appropriate `LLT`
generation.
* For this reason added flag in GlobalISelMatchTable` to allow switch
between legacy and new extended LLT names
* Revert using stubs like `LLT::float32` for float types as they are
real now. Added `TODO` for such cases.
Also MIRParser now may parse new type indentifiers.
---------
Co-authored-by: Tim Gymnich <tim@gymni.ch>
Co-authored-by: Ryan Cowan <ryan.cowan@arm.com>
b1aa6a4506